Mechanical movement.



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110.853.4713. I PATENTED MAY 14, 1901.

H. H. A. smvnm,

MECHANICAL MOVEMENT. unnuuol rum) um. no. 1004.

witnuuo' HANS TlElINIl'tlCIl' AUGUST SllCVlQltS, ()F DAVIC'NPORJ, IOWA.

MECHANICAL MOVEMENT.

Specification of Letters Patent- Patented May 14, 1907.

Application filed September 20,1904. Serial No. 226,270.

To (Y/ZZ whrmt it may concern.-

Be it known that .l', HANs HEINRICH AUGUST Sim nus, a citizen of the United States, residing at Davenport, in. the county of Scott and State of Iowa, have invented new and isef'arl lxn 'irovenrents in Mechanical Movements, of which the following is a specification.

This invention relates to a mechanical .n'aovement adapted to convert a continuous rotary motion into an alternating rotary motion ch. as is izsrally required for dashers or agitators of churns or washing machines, this invntion being 1!.016 particularly designed for use with the latter.

The object of the present invention is to increase the throw or rotation of the alternatelydriven member or agitator and toi. npart a variable speed thereto without increasing the diameter of the driving member which, in the present instance, consists of a continuously driven cam of varying pitch that rotates in a plane at right angles to the rotation of the driven member and actuates the latter throu h the medium of a reciprocatory rack. T e rack meshes with a gear on the driven member and carries a slide which engages a duplex peripheral cam groove in the driving member. By providing this duplex cam considerable rotation is imparted to the agitator shaft while the diameter of the cam 1s not increased.

For a full understanding of the detail construction, merits and advantages of my invention, reference is to be had to following description and the accompanying drawing in which:

Figure 1, is a perspective view of the mechanism mounted on the lid or cover of a washing machine. Fig. 2, is a plan view. Fig. 3, a transverse section on the line -95: of Fig. 2; and Fig. 4 is a detail in perspective of the slide which is carried by the rack.

Makin renewed reference to the drawings wherein fike characters of notation indicate corresponding parts appearing in the several illustrations, and reference being had thereto.

1 designates the lid or cover of a washingmachine, and 2 a frame which is provided with integral u rights or standards 3, 4 and 5 each of which as a bearing for the driving shaft of the driving cam hereinafter to be referred to.

Journaled in a boss 6 of the frame is the Secured to the lid or cover 1 on one side of the frame, and extending parallel therewith is a guide or grooved way 9, in. which the rack 10 is reciprocally mounted. This rack has a base 11, provided with lateral flanges or wings 12, which engage with the grooves of the guide, and its rack bar or toothed portion 13 mesheswith the pinion S. This rack is also provided with a vertical standard 14 in the upper end of which is a transverse bore 15; and journaled in the bore is a stud 16 having a slide-block 17 on its inner end. This slide block is of oblong shape and preferably concave on its outer face to conform to the periphery of the rotary driving drum with which it cooperates, and its sides are convex as at 18 for the purpose hereinafter described. standard and engages the slide to reduce friction.

19 designates a drum which is pierced by a driving shaft 20 that has its hearings in the uprights 3, 4 and 5 of the frame, the drum being mounted between uprights 3 an d 4 and held against longitudinal movement thereby, but adapted to be continuously rotated with the said shaft which is provided on its outer end with a balance wheel 21 .thatcarries a crank handle 22. Obviously, the shaft may be driven by belt and pulley or gearing or the like. This drum 19 is formed with a duplexperi heral-cam groove 23 in which the slide bloc. 17 rides when the drum is rotated-and inasmuch. as the side faces of the cam groove are necessarily curved, the convex side faces of the slide will readily conform to such curvature, especially at the ends of the drum where the curve of the groove is accentuated. The course of the cam groove is such. as to describe two parabolic curves which intersect at the center oi the drum on one side thereof, as at 24, and since the slide block is longer than the Width of the groove it will pass the'intersecting groove without interference.

From the description thus far given, it will be understood that when the drive shaft 20 is continuously rotated it will also rotate the drum 19 the groove of which is engaged by the slide block 17 and cause the slide to ride around the groove; the direction of the A roller 14 is journaled in the slide being indicated by arrow a in Fig. 2. This movement will of course slide the rack longitudinally in its guide i) and the rack bar being in. mesh with the pinion 8, the latter will be rotated. It will also be seen that during one revolution of the drum 19, the rack bar 13 will be movediu one direction, and upon the next revolution the rack bar will be n'ioved in the reverse direction.

The cam is of such shape that it i1nparts a variable speed to the rack bar and the dasl'ier-sl'iait, and this by virtue of the double parabolic curve that it describes. The cam. groove at the ends of the drum is almost at right angles to the axis thereof, but gradually extends upwardly at an incline toward the axis as at 1), until it reaches the center 24 of the drum where it intersects the return groove and then extends downwardly on the opposite side at the same incline, as at 0, until it reaches the bottom at the other end of the drum, the curve at such. point being substantially at right angles to the longitudinal axis of the drum. The groove then extends u'p\ the other side of the drum, as at (1 crosses the first mentioned groove at 24 and follows down the op osite side as at e where it joins-the portion at the end of the drum. By this construction the rack will travel faster during the traverse oi the slide block in the inclined portions of the groove and slower when the block is near the ends of the drum so that there will be a variable speed imparted to the rack and the driven shaft 7, each shaft gradually coming to a standstill at the end of each alternate rotation or stroke.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A mechanical movement embodying a continuously rotated driving member, a reciprocatory rack bar having a slide swiveled therein adapted to engage the driving memher, an alternately rotated driven member having a pinion engaged by the rack bar, and means formed on the driving member to impart a variable speed to the rack bar and driven member.

2. A mechanical movementembodying a continuously rotated driving member having a duplex peripheral cam groove, a recipro catory rack bar provided with a slide block adapted to engage the cam groove, and an alternately rotated driven member having a pinion with. which the rack-bar engages.

23. A mechanical movement com'm'ising a continuously rotated driving drum having a duplex peripheral cam groove that describes-two parabolic curves each of which terminates and joins at the center on one side of the drum, a rack bar a slide block swiveled therein adapted to engage with the cam groove, and an alternately rotated driven shal't a pinion which engages with the rack bar.

4. A mechanical movement for washing machines embodying a driven shaft a pinion thereon, a grooved guide secured to the machine, a rack bar slidably mounted in said guide and having a rack in engagement with the pinion and also having a vertical standard extending above the pinion, a slide block swiveled in the standard and projecting laterally therefrom, and the continuously rotated grooved cam engaged with the slide block, substantially as specified.

5. A mechanical movement for washing machines, embodying a driven shaft, a pinion thereon, a rack bar engaging the pinion, a slide carried by the rack bar, and a driving member having a cam groove engaged by the slide and constructed and arranged to impart a variable speed to the rack and the driven shaft.

6. A mechanical movement for washing machines, embodying a driven shaft, a pin ion thereon, a rack bar engaging the pinion, a slide carried by the rack bar, and a driving member having a slideengaging-surface of such shape as to reciprocate the rack with a gradually diminishing and increasing speed at the endiand beginning of each stroke respectively.

7. A mechanical movement for washing machines, embodying a driven shaft, a pinion thereon, a rack bar engaging the pinion, an oblong slide block swiveled in the rack bar and having convex sides, and a driving member having a duplex peripheral cam groove engaged by the slide block.

In testimony whereof I aflix my signature in the presence of two subscribing witnesses.

HANS HETRRICH AUGUST SIEVERS. V

Witnesses:

JOHN F. GRANT, JOHN H. Bunsen. 

